Roof Waterproofing Coatings · an Amrize brandCold-applied polyurethane base coat for traffic-bearing surfaces — balconies, walkways and decks, with higher abrasion resistance than silicone.
The jobs this product is specified for, day in day out.
Traffic-bearing waterproofing on concrete and plywood decks.
Renews weathered sheet where a hard-wearing membrane is wanted.
The tough skin that stops bird pecking and UV attack on exposed closed-cell foam.
What the data sheet actually gives you on site.
Exceeds ASTM C957 for pedestrian and vehicular decking — silicone is not designed for that duty.
350% elongation with it, so the membrane moves with the deck instead of tearing.
Effectively vapour-tight, which matters over occupied spaces and insulated build-ups.
No torches, no hot works — liquid applied straight onto the prepared substrate.
The facts that matter, straight from the product data.
| Type | Single-component moisture-curing polyurethane |
| Use | Balconies, walkways, trafficked decks |
| System | Base coat under the GacoFlex U92 aliphatic top coat |
| Warranty | 15–20 years when applied to specification |
Type your area and we’ll do the maths — derivation shown, nothing hidden.
Everything from the manufacturer’s literature — open the part you need.
Single-component aromatic urethane base coat for the Gaco U9 Series 3-coat roof system. High tensile strength, excellent adhesion, UV and moisture protection. Apply by roller, spray, or brush. 5-gallon pails. Contact us for pricing and availability.
These products are designed to work together — buying the full system is what qualifies the warranty.
Written by our technical team — free to download, no email required.
PDFU91 + U92 Urethane Application GuideTrafficked decks, metal & asbestos cement roofs, over spray foam — free 7-page guide PDFGacoFlex U91 Product Data SheetOfficial Gaco PDS — properties, priming and application PDFU91 + U92 over Metal — 20-yr System SpecFull Gaco application specification (36 mil build)Tell us about the building and we’ll spec the job free — the right system, the right quantities, and trade rates if you’re buying for a contract.
Tell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.
